Integrated GPS/inertial navigation apparatus providing improved heading estimates
US5657025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1995 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Aug 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The integrated GPS/inertial navigation apparatus utilizes satellite signals received with two spatially-separated antennas to achieve improved heading estimates for a mobile platform. Each satellite signal comprises one or more component signals with each component signal having a different carrier frequency. The integrated GPS/inertial navigation apparatus consists of a receiver and an inertial navigation system. The receiver measures the carrier phase of each of one or more component signals of one or more satellite signals received by each of the two antennas during successive time periods of duration T.sub.p. Phase measured during a T.sub.p time period is called T.sub.p -phase. Only one component signal of one satellite signal received by one antenna is measured during any T.sub.p time period. The receiver utilizes the T.sub.p -phases of each component signal obtained during a T.sub.k time period to estimate the phase of the component signal at the end of the T.sub.k time period, the estimated phase at the end of the T.sub.k time period being called the T.sub.k -phase. The inertial navigation system, comprising inertial sensors and a digital processor, utilizes the T.sub.k -pha…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.